Device for cleaning coal-breakers.



PATENTED MAY 9, 1905.

J. L. MILLER.

DEVICE FOR CLEANING GOAL BREAKERS.

APPLICATION FILED APR.28, 1904.

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WITNESSES.

Urine STATES Patented May 9, 1905.

, ATENT FFICE.

JESSE L. MILLER, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO HEYL & PATTERSON, OF PITTSBURG, PENNSYLVANIA.

DEVICE FOR CLEANING COAL-BREAKERS.

SPECIFICATION forming part of Letters Patent No. 789,167, dated May 9, 1905.

Application filed April 28,1904. Seria1No.206,299.

T roll/117720122, it may concern:

Be it knownthat I, Jesse L. MILLER, a rosident of Pittsburg, in the county of Allegheny and State of Pennsylvania,have invented a new 5 and useful Improvement in Devices for Cleaning Coal-Breakers; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to coal-breakers, and

more especially to that type of coal-breaker known as the Bradford breaker, which comprises a large rotary perforated cylinder having shelves therein adapted to lift the coal introduced into the cylinder and by the rotation of the cylinder to drop the coal so that the same is broken by its fall and which when reduced to the proper degree of fineness passes through the perforated walls of said cylinder.

In the practical operation of the above-described coal-breakers it sometimes happens that the coal clogs up the perforations in the cylinder, due to too much moisture in the coal, and this clogging up of the perforations interferes with the proper operations of the breaker, as the fine coal collects in the cylinder and is not permitted to escape.

The object of my invention, therefore, is to provide a device for keeping the perforations or mesh of the cylinder free from the coal and prevent its clogging therein, so as to interfere with the discharge of the coal from the cylinder.

To these ends my invention comprises the novel features hereinafter set forth and claimed.

To enable others skilled in the art to make and'use my invention, I will describe the same more fully, referring .to the accompanying drawings, in which 4 Figure 1 is a longitudinal view, partly in section and partly broken away, of a suitable coal-breaker with my invention applied thereto. Fig. 2 is a cross-section on the line 2 2, Fig. 1; and Figs. 3, 4, and 5 are enlarged details.

Like numerals indicate like parts in each view.

The numeral 2 designates a suitable support for the breaker-frame 3. The cylinder 4 is provided with the journals 5, supported 5 in the frame 3, said cylinder having the cogwheel 6, with which the pinion 7 on the shaft 8 meshes. This shaft8 has the pulley 9, which may be connected up to any suitable source of power. In this manner the rotary movement is imparted to the cylinder 4.

The cylinder 4 is made up of the curved perforated plates 10, which are connected by the inner and outer strips 11 11, respectively, secured by the bolts 12. WVithin the cylinder 6 4: are the shelves 13, said shelves being secured in place by means of the bolts. These shelves secured in this manner extend substantially the length of the cylinder and are provided with the adjustable extension 19. 5 This form of shelf with the adjustable extension forms the subject-matter of an application for Letters Patent of the United States filed by William J. Patterson on the 19th day of December, 1903, Serial No. 185,812, and it 7 is therefore not deemed necessary to enter into the details of the construction of same, as it forms no part of my present invention, and I disclaim any right to said invention. The shelves are arranged at suitable intervals 7 5 within the cylinder as may be found necessary and accordingv to the diameter of the said cylinder.

Secured within the cylinder at proper intervals are the guiding-blocks 25, said guiding-blocks being arranged with reference to each other so as to form spiral grooves within the cylinder, so that in the rotation of the cylinder these grooves will tend to carry the coal from the feeding end of the cylinder to the 5 discharge end. These guiding-blocks 25 are held in place by means of bolts 25, and the angle of these blocks may be varied according as it is desired to feed the coal more rapidly from the feed end to the discharge end 9 of the cylinder, all of which forms no part of my present invention.

The cylinder is provided with the discharge 26, and in order to direct the impurities or refuse to this discharge the spiral chute 27 is employed.

Connected to the feed end 28 of the breaker is the chute 29, which is connected with a suitable feeder.

Secured to the perforated plates 10, which compose the cylinder, are the brackets 32, said brackets having the flanges 33, by means of which said brackets are secured to said plates by bolting or otherwise. These brackets 32 are arranged at suitable intervals upon the plates 10; but under ordinary circumstances it will probably not be necessary to use any of said brackets beyond the mid-point of the cylinder, although they may be extended beyond that point, if found necessary. The brackets 32 are provided with the guideways or slots 34, with the offset or recess 35 at the outer end of said bracket. A knocker or hammer 36 is mounted in each bracket 32,

said knocker having the trunnions 37, which engage the slots 34 and recess 35 of said bracket.

The coal to be broken is fed to the feeder and is discharged into the chute 29, whence it passes into the cylinder 4. As the cylinder rotates the coal is lifted up by the shelves 13, and when said shelves pass beyond a certain point in their rotation the coal is dropped into the cylinder and by the force of its fall is broken. That portion of the coal which is of the proper degree of fineness passes through the perforations, while the larger pieces are again lifted by the next succeeding shelf and dropped in the same manner.- In the meantime the coal has been fed toward the discharge end of the machine by the action of the spirally-arranged guiding-blocks 25, and by the time the coal has reached the discharge end substantially all of it will have been broken to the proper degree of fineness to pass through the perforations with the exception of the slate and sulfur balls, which are of a harder quality, and this will pass out through the spiral chute 27 to be discharged from the discharge end 26 of the cylinder. It often happens, however, that the coal when fed to the breaker contains considerable moisture and when broken up by its fall within the cylinder the fine particles tend to adhere to each other instead of passing through the cylinder, acting to collect on the walls of said cylinder and clog up said perforations, so as to prevent the proper discharge of the coal from the cylinder. However, as the cylinder rotates the knockers 36 will act to jar the plates of the breaker so as to expel the coal which collects in the perforations and free it therefrom, so that the coal is free to pass through said perforations. As indicated in Fig. 2, it is apparent that the hammer 36 will remain with its trunnions 37 in the offset 35 of the bracket until the bracket passes beyond the center when the cylinder is rotating in the direction indicated by the arrow, Fig. 2. When the bracket passes beyond the center, the hammer 36 will be free from the recesses 35 and will drop down the slot 34 and come in contact with the plate 10. The weight of the hammer 36 will be sufficient to jar the plates, so as to expel any of the fine coal which may be clogging up the perforations of said plate. This fine coal, jarred by means of the hammer 36, will fall back into the cylinder and when the plate comes around to the point where the coal is discharged therefrom the perforations will be free to discharge the coal in the proper manner.

What I claim is 1. In a coal-breaker, the combination of a G. H. RANKIN, RoBT. D. TOTTEN. 

